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Modified sulfur-containing nano-silicon dioxide reinforced cable insulating layer material and application thereof

A nano-silica and insulating layer technology, applied in rubber insulators, organic insulators, etc., can solve the problems of affecting the reinforcement effect of silica particles, difficulty in uniform dispersion of silica particles, and poor dispersion, so as to improve mechanical properties and Insulation performance, enhanced reinforcement effect, strong mobility effect

Active Publication Date: 2019-02-05
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used silica filler has a large particle size (micron and above), and poor compatibility with the organic matrix, making it difficult for the silica particles to disperse uniformly in the matrix
However, when using the gas phase method to prepare nano-silica as a filler, the surface of the particles has more active hydroxyl groups and larger surface energy, which is easy to agglomerate, and there is also the problem of poor dispersion, which greatly affects the quality of the silica particles. Enhanced effect of

Method used

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  • Modified sulfur-containing nano-silicon dioxide reinforced cable insulating layer material and application thereof
  • Modified sulfur-containing nano-silicon dioxide reinforced cable insulating layer material and application thereof
  • Modified sulfur-containing nano-silicon dioxide reinforced cable insulating layer material and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A modified sulfur-containing nano-silicon dioxide-reinforced cable insulation layer material, the raw materials of which include, in parts by weight, 100 parts by weight of butyl rubber, 10 parts by weight of modified sulfur-containing nano-silicon dioxide, and 6 parts by weight of oxidized polyethylene wax. Parts by weight, 11 parts by weight of carbon black, 0.5 parts by weight of antioxidant 4010NA (N-isopropyl-N'-phenyl-p-phenylenediamine).

[0034] Preparation of modified sulfur-containing nano-silica:

[0035] Add 50mL of absolute ethanol and 25mL of deionized water into the three-necked flask, add dropwise ammonia water until the pH is 10, and after the solution is evenly stirred, slowly add tetraethyl orthosilicate (TEOS) which accounts for 8% volume fraction of the solvent volume dropwise, React at room temperature for 3 h, then add N-methylpyrrolidone solution containing bis(triethoxysilylpropyl) tetrasulfide in a volume fraction of 2% by volume of the solvent...

Embodiment 2

[0044] A modified sulfur-containing nano-silicon dioxide-reinforced cable insulation layer material, the raw materials of which include, in parts by weight, 100 parts by weight of silicone rubber, 8 parts by weight of modified sulfur-containing nano-silicon dioxide, and 10 parts by weight of oxidized polyethylene wax Parts, 12 parts by weight of carbon black, 1 part by weight of antioxidant titanium dioxide;

[0045] The specific preparation steps of modified sulfur-containing nano-silica are as follows:

[0046] (1) 7.2 parts by weight of nano-silica (5nm particle size) is placed in a beaker, and then adding a molar concentration of 0.5mmol / L sodium hydroxide solution to it to form a density of 1g / L nano-silica solution; then the nano-silica solution was sonicated for 10 minutes, centrifuged to collect the precipitate, washed with water three times until neutral, and dried at 40°C.

[0047] (2) Add N-methylpyrrolidone to 90 parts by weight of nano-silica treated in step (1) ...

Embodiment 3

[0056] A modified sulfur-containing nano-silicon dioxide-reinforced cable insulation layer material, the raw materials of which include, in parts by weight, 100 parts by weight of styrene-butadiene rubber, 10 parts by weight of modified sulfur-containing nano-silicon dioxide, and 8 parts by weight of oxidized polyethylene wax. parts by weight, 15 parts by weight of carbon black, and 0.6 parts by weight of antioxidant titanium dioxide.

[0057] The specific preparation steps of modified sulfur-containing nano silicon dioxide are as follows:

[0058] Dissolve tetraethyl orthosilicate with a volume fraction of 4% of the total volume in a mixed solution of 50 mL xylene and 10 mL acetonitrile to prepare a precursor solution with a concentration of 0.5 mol / L, react at room temperature for 3 to 4 hours, and then add After adding bis(triethoxysilylpropyl) disulfide accounting for 2% volume fraction of the solvent volume, inject the precursor solution into the syringe pump, and dispers...

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Abstract

The invention provides a modified sulfur-containing nano-silicon dioxide reinforced cable insulating layer material. The cable insulating layer material is prepared from the following raw materials inparts by weight: 100 parts of rubber, 5-10 parts of modified sulfur-containing nano-silicon dioxide, 5-10 parts of oxidized polyethlene wax, 10-15 parts of carbon black and 0.5-1 part of an antioxidant. According to the cable insulating layer material, nano-silicon dioxide is modified through a sulfur-containing silane coupling agent so as to obtain the sulfur-containing nano-silicon dioxide withexcellent dispersity, then the sulfur-containing nano-silicon dioxide simultaneously serves as a vulcanizing agent and a reinforcing agent to be added into a master batch, the insulating property andthe mechanical property of the cable insulating layer material can be effectively enhanced without additionally adding the vulcanizing agent, in addition, the technological process can be further simplified, the process time can be further shortened, and the cable insulating layer material has great significance in increasing the yield.

Description

technical field [0001] The invention relates to the technical field of wire and cable production, in particular to a modified sulfur-containing nano-silicon dioxide-reinforced cable insulating layer material and its application. Background technique [0002] Rubber materials have excellent properties such as chemical resistance, low temperature resistance and weather aging resistance, so they are widely used in the preparation of cable insulation layers. With rubber as the base material and carrier, silicon dioxide (SiO 2 ) particles are used as fillers to make the insulating layer of cables, which can effectively enhance the properties of rubber materials such as insulation, wear resistance, and flame retardancy, reduce the density of the existing insulating layer, and improve flexibility. However, the commonly used silica fillers have large particle sizes (micron and above), and poor compatibility with the organic matrix, making it difficult for the silica particles to di...

Claims

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Application Information

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IPC IPC(8): C08L23/22C08L23/30C08K13/06C08K9/06C08K3/36C08K3/04C08K5/18H01B3/28
CPCC08K2201/011C08L23/22C08L2203/202H01B3/28C08L23/30C08K13/06C08K9/06C08K3/36C08K3/04C08K5/18
Inventor 薛龙建汪鑫郑颖杰谭迪
Owner WUHAN UNIV
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